document.write( "Question 520675: Square root of x+8=x-4 \n" ); document.write( "

Algebra.Com's Answer #346164 by unlockmath(1688) $\"\"$ $\"About$

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Hello,
\n" ); document.write( "With this Sq rt x+8=x-4
\n" ); document.write( "Square both sides:
\n" ); document.write( "x+8=(x-4)^2
\n" ); document.write( "Expand this out to get:
\n" ); document.write( "x+8=x^2-8x+16
\n" ); document.write( "Subtract 8 & x to get:
\n" ); document.write( "x^2-9x+8=0
\n" ); document.write( "factor:
\n" ); document.write( "(x-8)(x-1)=0
\n" ); document.write( "Solve for x
\n" ); document.write( "x=8
\n" ); document.write( "x=1
\n" ); document.write( "Check the answers:
\n" ); document.write( "1 doesn't work
\n" ); document.write( "8 works
\n" ); document.write( "make sense?
\n" ); document.write( "RJ
\n" ); document.write( "www.math-unlock.com \n" ); document.write( "

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